Level Alarm Switch

• Arjay Engineering Limited
• Ontario

Level Alarm Switch

The 9820 and 9830 provides an economical means to alarm on the high or low condition of a liquid or bulk solids vessel. The 9820 electronics are mounted directly onto the probe for easy and compact installation. For applications that require the control circuitry and relays remote from the vessel, the 9030 employs the Arjay Pulse Module Circuit (PMC). This allows the electronics to be mounted up to 1 km away from the probe using inexpensive 2-conductor shielded wire.On a rise or fall of product around the probe, a relay contact closure will be initiated for remote control and alarms. On a vertical probe, a differential can be set to cycle the relay on and off between two distinct points along the length of one probe. This is typical of pump or valve cycling to control the useage and refilling of tanks. Additional standard features include an adjustable time delay (Delay On or Off), fail-safe selection, 0-100% differential, a DPDT relay, and a simple push button calibration to set the unit up. The unit can